Posts

All the articles I've posted.

• LeetCode 322 Coin Change

  1 May, 2026

  Solutions for LeetCode 322, medium, tags: array, dynamic programming, breadth-first search.

• LeetCode 895 Maximum Frequency Stack

  1 May, 2026

  Solutions for LeetCode 895, hard, tags: hash table, stack, design, ordered set.

• LeetCode 2064 Minimized Maximum of Products Distributed to Any Store

  Updated: 1 May, 2026

  Solutions for LeetCode 2064, medium, tags: array, binary search, heap.

• System Design - How Redis Persistence Works

  28 Apr, 2026

  How Redis persists data to disk: RDB snapshots via fork() and copy-on-write, AOF (Append Only File) logging, fsync policies, AOF rewriting, and the hybrid RDB+AOF approach. Source code walkthrough from the redis/redis repository.

• LeetCode 39 Combination Sum

  26 Apr, 2026

  Solutions for LeetCode 39, medium, tags: array, backtracking.

• System Design - How Linux Containers Work Under the Hood

  26 Apr, 2026

  How Linux containers work: namespaces for isolation, cgroups for resource limits, union filesystems for layered images, and how container runtimes like runc tie it all together.